ISSN:
1434-601X
Keywords:
25.70.Jj
;
23.20.-g
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The spectra of theKX-rays of reaction products were observed in coincidence with high energy gamma-rays (E γ≧10 MeV) in thenatSn+40Ar (E Ar=300 MeV) and68Zn +64Zn (E Zn=290 MeV) reactions. Two groups ofKX-rays can be clearly identified in the spectra. The first one corresponds to the evaporation residue of the compound nucleus and the second one to the target-like products of the reaction. The spectra of gamma transitions gated by theKX-rays of the evaporation residues were measured in both reactions. The relative yields and the positions of the broad shoulders observed at an energyE γ≧10 MeV in these spectra, differ drastically in the asymmetric and the symmetric systems. The ratio between the yields of gamma-rays emitted at angles of 0° and 90° to the beam direction was determined in thenatSn+40Ar reaction. It was found to be greater than unity only atE γ=(10–14) MeV. This experimental evidence may indicate the emission of high energy gamma-rays from the dinuclear system prior to the formation of the compound nucleus.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01295256
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